Shower Installation Cost UK: Electric & Thermostatic Prices

Quick Answer: A UK shower installation prices at £350-£650 for a like-for-like electric shower swap, £750-£1,400 for a thermostatic mixer with new tray and enclosure, and £1,800-£3,800 for a full power shower installation with pump, tray, screen and tiled walls. Labour is a 0.5-2 day job for a plumber; add a Part P electrician (£280-£380/day) for any electric shower wiring beyond a like-for-like swap. Always cost-in tanking, soil pipe rerouting and waste pipe upgrades.

Summary

Shower installation is the most-quoted single bathroom task in the UK, and the most under-priced. The label "shower install" hides four very different jobs: an electric shower swap (single-plumber morning), a thermostatic mixer over a bath (1 day), a separate shower enclosure on a tray (1.5-2 days plus tiler), and a power-pumped shower with a stored hot water system (2-3 days + electrics). Quoting any of these at the same headline figure is the root of nearly every shower install dispute.

The pricing decision splits along three axes: hot water source (combi mains pressure / cylinder gravity-fed / unvented mains pressure / pumped), enclosure type (over-bath / tray + screen / wet-room / steam), and electrical work needed (none / supply spur / new dedicated circuit). Each combination drives a different trade mix. A combi-fed thermostatic mixer over a bath needs only a plumber; a pumped power shower in a gravity system needs a plumber, an electrician (Part P), and often a builder for joist notching. The trade-day count, not the kit price, drives the quote.

This guide covers all four shower install scenarios with the labour, materials, and Building Regulations considerations. For full bathroom refits see full bathroom installation pricing guide; for wet rooms see wet room pricing guide; for en-suites see en suite pricing guide.

Key Facts

Quick Reference Table

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Shower Type Scope Labour Days Total Range (Regional) Total Range (London)
Electric shower swap (like-for-like) Swap unit, reuse cable + waste 0.25-0.5 plumber £180-£380 £240-£480
Electric shower install (new) New 10mm² circuit, isolator, unit 0.5 plumber + 0.5 electrician £450-£850 £580-£1,050
Mixer over bath (combi) New riser kit, divertor spout 0.5 plumber £280-£550 £360-£680
Thermostatic concealed (combi) Chase wall, riser, head, valve, screen 1-1.5 plumber + 0.5 tiler £750-£1,400 £950-£1,800
Power shower (gravity tank + pump) Pump + valve + head + plumbing 1 plumber + 0.25 electrician £950-£1,600 £1,200-£2,000
Full enclosure + tray + tiling Tray, screen, valve, tiles 1.5-2 plumber + 1 tiler £1,800-£3,800 £2,400-£4,800
Walk-in low-profile tray + glass panel Stone resin, fixed glass, linear waste 2 plumber + 1.5 tiler £2,400-£4,800 £3,200-£6,200

Detailed Guidance

Electric showers — supply, swap and full install

A like-for-like electric shower swap is the simplest shower job. The existing 10mm² T&E (twin and earth) cable and pull-cord isolator stay; the plumber breaks the supply (typically a 15mm pipe with isolation valve), replaces the unit, and reconnects. Time is 1.5-3 hours. The job is NOT notifiable under Part P provided no new cable run is added and the existing circuit protection is correct. Always test insulation resistance and check the existing isolator is rated to the new kW (most are 45A — a 9.5 kW shower draws ~41A).

A new electric shower install — common in en-suites being upgraded — needs a dedicated radial circuit from the consumer unit. 10mm² T&E is standard for showers up to 10.8 kW at 240V (43A); upgrade to 16mm² for runs longer than 18m or for parallel installations. A 50A MCB or RCBO is fitted at the consumer unit; a 45A double-pole pull-cord isolator above the bathroom door (Zone 3 minimum); the cable enters the unit from above, never from below. This work is notifiable under Part P unless the electrician is registered with a competent person scheme (NICEIC, NAPIT, ELECSA, etc.).

Common pricing miss: assuming a 9.5 kW upgrade works on the old 6 kW circuit's 6mm² cable. It doesn't — 6mm² is rated for 32A; a 9.5 kW shower at 240V draws 39.5A and will run hot, sag, and trip the MCB. The replacement cable and MCB are the hidden cost. See electrical fault finder.

Thermostatic mixer showers — concealed vs exposed

Exposed bar valves (visible chrome bar across the wall) are the simpler install: two 15mm hot/cold tails come out of the wall, the bar connects with compression nuts, and the head and rail mount above. 0.5 day for a plumber. Concealed valves require chasing the wall, building a stud panel, or building a service void — typically 1-1.5 days plus plaster make-good and re-tile. Always provision for the wall build-out: concealed valves are typically 75-95mm deep including back-box and require 100mm+ clear depth behind the tile face.

Pressure matters. Most modern thermostatic mixers require a minimum 1.0 bar dynamic pressure for full performance; some "high-flow" units need 2.0+ bar. Combi boilers deliver 1.5-3.0 bar at the outlet; gravity-fed (cold tank in loft, hot cylinder downstairs) typically 0.1-0.4 bar at first-floor showers — gravity-fed systems usually need a pump (see below). Unvented systems run at mains pressure (typically 2-4 bar) and feed thermostatic mixers happily.

The TMV2 standard (BS EN 1111:2017) requires the shower outlet to be 38-46°C with mixed water at the head, not at the valve — this is why concealed runs longer than 1.5m sometimes fail certification. Specify TMV2-approved valves for dwellings; TMV3 (BS 7942) is for healthcare and assisted-living and not normally fitted in private homes.

Power showers and pumped systems

Power showers contain an integrated pump in the unit; pumped shower systems use a separate twin-impeller pump on the gravity-fed hot and cold supplies. Power showers are simpler to install (single appliance, 240V supply, 15mm hot and cold in) but limited in head choice. Separate pumps allow any thermostatic mixer to deliver pumped performance — the pump sits in the airing cupboard or under the bath, fed from the cold tank and hot cylinder, with a 230V fused spur and an electrical fused connection unit.

The pricing variable is access. Pumps need a 230V fused spur (preferably with isolator), clear access for service (replacing the pump every 5-8 years is normal), and either a Surrey/Essex flange in the hot cylinder or a Warix flange on the cold tank to draw water cleanly without air entrainment. Cutting the existing cylinder for a Surrey flange — common in 1970s-1990s installations without one — adds £150-£300 in plumbing time.

Negative-head pumps (which mount below the cold tank, e.g. in a downstairs cupboard for a ground-floor shower) cost 30-50% more than standard positive-head pumps but are mandatory below the tank level.

Tray, enclosure and tiling — the visible cost

The shower tray is the start of the waterproof envelope. Acrylic-capped resin trays (£100-£250) are the volume choice; stone-resin or slate-effect (£250-£700) are the premium choice. Low-profile (40-50mm) trays look modern but require a 90mm shallow trap and frequently a joist notch — engineering joists (TJI / I-joists) cannot be notched without manufacturer sign-off, so trim depth dictates feasibility.

Enclosures range from off-the-shelf quadrant (£150-£400) to bespoke walk-in glass (£800-£2,000+). Bespoke glass needs a steel frame or wall-mount channel; the manufacturer typically templates and the lead time is 3-6 weeks. The price impact of waiting is rarely costed — most disputes are not about the cost but about programme overruns when the bespoke screen is delayed.

Tile cost is per-m² supply plus a day rate for the tiler. A typical shower enclosure has 4-6m² of wall tile and 0.8-2m² of floor; mosaic floor tiling (slip-resistance for Part M / BS 8300 grade R10-R11) takes 1.5-2x as long as standard ceramic. Tanking the enclosure is mandatory for ceramic finishes on plasterboard: BAL Tank-it or Schlüter-KERDI systems at £15-£30/m². Skipping tanking is a 3-5 year liability bomb.

Hidden costs and risk premium

The five most-missed cost lines in shower quotes are: (1) waste pipe upgrade — 32mm domestic waste cannot handle a 9 l/min thermostatic shower without gurgling; 40mm is mandatory; (2) soil pipe rerouting if the shower position changes by more than 1m; (3) extract fan upgrade — Part F requires 15 l/s intermittent in a shower-only room or 8 l/s continuous; (4) consumer unit upgrade if the existing board has no RCBO protection; (5) limescale pre-filter if the home is in a hard water area (>200 mg/l CaCO3) — protects the thermostatic cartridge and head.

Risk premium of 10-15% is standard on shower quotes in pre-1985 properties: cast-iron soil stacks, lead service pipes, and asbestos vinyl floor backing are likely surprises.

Frequently Asked Questions

Do I need Part P certification to swap an electric shower?

No, not for a like-for-like swap that reuses the existing cable, isolator, and circuit protection. Part P notification applies to new circuits and to alterations in special locations (Zones 0/1 within the shower enclosure). Replacing the appliance only is "maintenance" and is not notifiable. If you replace the cable, increase the kW rating, or change the consumer unit, it IS notifiable and must be self-certified via NICEIC/NAPIT/ELECSA or notified to the LABC before work starts.

Can I install a power shower on a combi boiler?

No. Combi boilers deliver mains-pressure hot water on demand — running a pump on the hot outlet of a combi causes overheating, kettling, and warranty void on every major UK combi (Worcester, Vaillant, Ideal, Baxi, Viessmann all prohibit it). Combi systems should use thermostatic mixers, not power showers. If the customer wants higher flow than the combi delivers, the answer is a larger combi (35-42 kW), a system boiler with unvented cylinder, or a heat pump with cylinder.

What is the difference between a wet room and a tray shower?

A wet room has no tray and no enclosure — the entire bathroom floor is the drainage surface, tanked, with a fall to a linear or point drain. Wet rooms require structural assessment (timber floors need ply or backer-board overlay), full Schlüter or BAL Tank-it tanking, and a fall of 1:50-1:80. A tray shower uses a manufactured shower tray as the waterproof base and an enclosure to contain the spray. Wet rooms cost 40-80% more for the same footprint. See wet room pricing guide.

How long does a typical shower install take?

A like-for-like electric swap is 1.5-3 hours. A new mixer over an existing bath is half a day. A new concealed thermostatic with new tray and screen is 1.5-2 days plus a tiler. A pumped power shower with no existing pump is 1 day plumber plus 0.25 day electrician. A full new shower enclosure with tray, screen, tiling and tanking is typically a 3-4 day calendar window (waterproofing curing requires 24h between coats).

Regulations & Standards